Pppine

* General fixes
* Changed author email

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* More fixes to import statements

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* Add query string parameters to a URL with `add_url_params()` in `urls`.

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* Added a middleware component for Django projects.
* Have Django automatically store an authenticated user's timezone (as saved in their profile)
in the current session variables.

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* Addressed import issues

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* NEW: Avoid running into problems when converting your data to JSON strings by using our universalized version of the comprehensive DjangoJSONEncoder.
* Also added a date-safe encoder that converts dates to integers for front-end parsing.
* Fixed importlib import statement to properly detect whether Django is installed.